Sulphur dyestuff paste



Patented Mar. 11, 1930 UNITED STATES PATENT-OFFICES;

ERNST VOETTER, F KONSTANZ, GERMANY, A SSIG-NOR TO GENERAL ANILINE WORKS,

' INC., 0]? NEW YORK, N. Y., A CORPORATION OF DELAWARE SULPHUR DYESTUFF PASTE No Drawing. Application filed February 24, 1928, Serial No. 256,799, and in Germany June 16, 1925.

' The present invention relates to homogeneous sulphur dyestulf pastes and to a process of preparing the same.

' I have found that homogeneous sulphur dyest-ufi' pastes are obtainable by adding to the press-cake of a sulphurdyestuif an alkaline reacting agent and a carbohydrate capable of being swelled .by the action of the said alkaline reacting agent. The new roducts thus obtainable are distinguished y their property of not depositing water or crystals upon continuous exposure to the atmosphere. Furthermore, no precipitation takes place when sodium sulfide is added to the new sulphur dyestuff pastes in the amount required for the dyeing operation. The new sulphur dyestufi' pastes can be employed exactly like the direct dyeing dyestuffs with the addition of salt and sodium carbonate. It is sur- .20 prising that even with the addition of comparatively large quantities of salt the colloid does not separate out with the formation of flakes. The addition'of swollen starch has moreoverthe advantage that uniform dyeing effects are obtainable especially with dyestufi's which only dye evenly with diflicultyand in addition the fibre is less severely treated. I

The addition of bactericidal agents, such for example as crude cresol or the sodium.

salt of toluene sulfochloramide operates to prevent the formation of mildew. The last named agent has at the same time the effect of converting the starch into soluble starch v during the heating in the dye-bath. The separation of crystals can be rendered still more diflicult by the addition of sulphur, which combines with the alkali sulfide present to form a polysulfide. The addition of hygro- 40 scopicalsubstances, such as molasses, glycerine, potassium carbonate and the like, is advantageous in order to counteract the loss due to evaporation of water. The following examples will illustrate my invention. v

Example 1.--A paste is made up of the following 80 parts of sulphur black paste of a dry content of 50 5 parts of flour 5 parts of caustic soda solution 40 B. and

10parts of Water. E trample 2.- A lowing 50 parts of sulphur black press cake of a dry content of 80% 2.5 parts of wheat starch 35 parts of crystallized sodium sulfide 3 parts of caustic soda solution 40 B.

9.45 parts of Water and 0.05 parts of sulphur.

Example 3.-A paste is made of the following: 50 parts of sulphur black press cake of a dry content of 80% 2.5 parts of starch V 25 parts of sodium sulfide crystallized 5 parts of caustic soda solution 40 B. 0.1 parts of sulphur, 5 parts of molasses and 32.4 parts of Water.

E wample 4.A paste is made up of the following 50 parts of sulphur black press cake of a dry content of 80% 2.5 parts of starch 50 parts of crystallized sodium sulfide 5 parts of potassium carbonate 0.1 parts of sulphur 0.1 parts of the sodium salt of toluene-sulfo-chloro-amide and 12.3 parts of Water.

I claim 1. The process forpre'pa-ring homogeneous sulphur dyestuff pastes, which comprises adding to the press-cake of a sulphur dyestulf a bactericidal agent, an alkaline reacting paste is made up of the folagent and a carbohydrate capable of being" swelled by theaction of the said alkaline reacting agent. 1

2. The process for preparing homogeneous sulphur dyestuif pastes, which comprises adding to the press-cake of a .sulphur d e-.

stufl a hygroscopic agent, a bacterici al agent, an alkaline reacting agent and wearbohydrate capable .of being swelled by the actionof the said alkaline reacting agent.

3. The process for preparing homogeneous sulphur dyestuif pastes, which comprises adding to a press-cake of a sulphur dyestuif an alkaline reacting agent, starch, and the sodium salt of toluene-sulfo-chloro-amide.

4. The process for preparing homogeneous sulphur dyestuif pastes, which comprises 3 ad ing to a press-cake of a sulphur dyestufi,

- starch, the sodium salt of toluene-sulfochloro-amide, potassium carbonate and crystallized sodium sulfide.

5. The process for preparing homogeneous o sultphur dyestuffv pastes, WhlCh comprises ad in to a an] hur black press-cake, starch,

crysta lized ium sulfide, potassium car bonate, sulphur and the sodium salt of toluene-sulfo-chloro-amide.

.1 6. As new products, homogeneous sulphur' V dyestufi pastes containing a bactericidal agent, an alkaline reacting agent and a carbohdyrate capable of being swelled by the action of the said alkaline reacting agent said dyestufi pastes having the property of not depositing water or crystals upon con- -tinuous exposure to the atmosphere.

' 7. As new products, homogeneous sulphur dyestufl pastes containing a hygroscopic as agent, a bactericidal a am, an alkaline reacting agent and a car ohydrate capable of being swelled by the action of the said alka- 1 line reacting agent. A

p 8. As new products, homogeneous sulphur a0 dyestufi. pastes containing an, alkaline reacting agent, starch, and the sodium salt of toluene-sulfo-chloro-amide, said dyestufi pastes having the property of not depositmg water or crystals upon continuous exposure to the atmosphere.

9; As new products, homogeneous sulphur dyestufi, pastes containing an alkaline reacting agent, starch, the sodium salt of toluene-sulfo-chloro-amide, potassium car- 0 bonate and crystallized sodium sulfide, said dyestufi vpastes having the property of not depositing water or crystals upon continugousex' retotheatm here. v

'10. newproducts, omoge'neous sulphur dyestufi pastes containing an alkaline reacting 9. nt, starch, the sodium salt of 'toluenesul o-chloro-amide, potassium carbonate, sulphur and crystallized sodium sulfide said dyestufi pastes having the propu erty of not depositing water or crystals upon .continuousexposure 'to the atmosphere.

11; As a new product,'the homogeneous made up of about 50 parts of sulphur lack presscake of a dry content of about u 80%, about 2.5 parts of starch, about 50 parts of crystallized sodium sulfide, about 5 parts of potassium carbonate, about 0.1 art of. sulphur, about 01 part of the sodium salt of toluene-sulfo-chloro-amide and about 12.5 parts of water.

' In testimony whereof I have hereunto set my hand.

' ERNST VOETTEB. 

